CN101241237B

CN101241237B - Method for manufacturing double-sided aspheric focal power progressively increasing lens

Info

Publication number: CN101241237B
Application number: CN 200810074239
Authority: CN
Inventors: 木谷明; 菊地吉洋
Original assignee: Hoya Corp
Current assignee: Hoya Corp
Priority date: 2002-05-28
Filing date: 2003-05-23
Publication date: 2012-12-26
Anticipated expiration: 2023-05-23
Also published as: CN101241237A; JP2003344813A; JP3617004B2

Abstract

To provide a bi-aspherical type progressive-power lens which provides an excellent visual acuity correction for prescription values and a wide effective visual field with less distortion in wearing, by reducing a magnification difference of an image between a distance portion and a near portion. The lens is characterized in that when on a first refractive surface being an object side surface, a surface refractive power in a horizontal direction and a surface refractive power in a vertical direction, at a far vision diopter measurement position F 1 , are DHf and DVf respectively, and on the first refractive surface, a surface refractive power in a horizontal direction and a surface refractive power in a vertical direction, at a near vision diopter measurement position N 1 , are DHn and DVn respectively, relational equations, DHf+DHn<Dvf+DVn, and DHn<DVn are satisfied, and surface astigmatism components at F 1 and N 1 of the first refractive surface are cancelled by the second refractive surface being an eyeball side surface so that the first and second refractive surfaces together provide a far vision diopter (Df) and an addition diopter (ADD) based on prescription values.

Description

The manufacturing approach of double-sided aspheric focal power progressively increasing lens

It is dividing an application of 03812271.5 application for a patent for invention that the application's name that to be HOYA Corp. submit on May 23rd, 2003 is called " double-sided aspheric focal power progressively increasing lens ", application number.

Technical field

The present invention is the lens that for example use with focal power progressively increasing lens with the presbyopia as glasses; Relate to and possess the focal power progressively increasing effect that second refractive surface to first refractive surface of object side surface and eyeball side surface separately distributes, combining said first surface and said second surface gives the double-sided aspheric focal power progressively increasing lens with the number of degrees (Df) and the adding number of degrees (ADD) structure far away according to prescription values.

Background technology

Use eyeglass lens though focal power progressively increasing lens is the presbyopia, know and to be the advantage of reading glasses and extensively to be utilized from the reason of the advantage that can see clearly continuously to not segmentation closely at a distance according to having in appearance to be not easy to be examined.But according in limited lens area, not adding the separatrix for see at a distance the visual field and in order to see the visual field nearby; And then situation about being configured for these a plurality of visuals field, the visual field of seeing their intermediate distances; The range in each visual field is not necessarily abundant, and main be that the visual field of side has and feels that the distinctive shortcoming of focal power progressively increasing lens in the distortion of picture and the zone of rocking etc. is also extensively known.

To improve the distinctive shortcoming of these focal power progressively increasing lens is purpose; Various motions are always just arranged; But the face structure of these existing focal power progressively increasing lens nearly all is in object side surface configuration " increasing progressively face ", in the combination of eyeball side surface configuration " sphere " and " astigmatic face ".Opposite with them, as being that the focal power progressively increasing lens of characteristics has the Atoral Variplas that sells of French Essel Optical Co (showing Essilor) in 1970 at eyeball side surface additional " increasing progressively effect ".

As by the prior art of motion the international technology of putting down in writing patent WO97/19382 number and the record of WO97/19383 communique etc. for example being arranged in recent years, generally be called the inside and increased progressively (or concave surface increases progressively).This fundamental purpose that is increased progressively the face structure by the inside of motion in recent years is through the part of the necessary adding number of degrees or all share the eyeball side surface from object side surface and reduce the difference of magnification with portion and nearly picture with portion far away, with the distortion that improves picture with rock.

In these prior aries WO97/19382 communique record be through object side surface as sphere with the symmetrical aspheric surface of rotation and " increasing progressively effect " whole cancellations; Only add (fusion) to " increasing progressively face " of giving the regulation adding number of degrees at the eyeball side surface; What the WO97/19383 communique was put down in writing is that " increasing progressively face " adding number of degrees of object side surface are lacked than setting; Giving " increasing progressively face " additional (fusion) that insufficient section adds the number of degrees inside on " sphere " and " astigmatic face " of side, structure.

Purpose with according on have different; But other prior aries as the focal power progressively increasing lens of being put down in writing that carries out " increasing progressively effect " at the eyeball side surface; For example opening clear 57-10112 communique, spy the public clear 47-23943 communique of spy, spy opens flat 10-206805 communique, spy and opens on the 2000-21846 communique etc. on the books; And with said WO97/19383 communique put down in writing identically as have a prior art of " increasing progressively effect " on the two sides of lens, for example open the 2000-338452 communique and Te Kai puts down on the 6-11835 communique on the books the spy.The common ground of these prior aries is to share the necessary adding number of degrees with positive, two sides, the inside.

The fundamental purpose of these prior aries is through the part of the necessary adding number of degrees or all share the eyeball side surface from object side surface and reduce far from portion and nearly difference of magnification with portion, wants to improve the distortion of the picture that is caused by difference of magnification and rock.But, clear and definite lacking of record only be in said international record patent WO97/19383 communique (below be called prior art 1) waits, only to have part to put down in writing to the basis of the effect that can improve.Promptly in prior art 1, put down in writing the calculating formula of the lens multiplying power SM that representes in (1) formula～(3) formula below, its basic evaluating as lens design is used.

Be that following record is arranged in the prior art 1.

" the multiplying power SM of lens generally representes with following formula

SM＝Mp×Ms (1)

Be called the focal power factor at this Mp, Ms is called form factor.Be the distance setting from the summit (inboard summit) of the face of lens eyeball side to eyeball L, be set at the focal power on inboard summit (inboard summit focal power) Po, be the thickness setting of lens center t, be set at the refractive index of lens n, when being set at Pb, following expression arranged to the datum curve of the face of lens object side (focal power).

Mp＝1/(1-L×Po) (2)

Ms＝1/(1-(t×Pb)/n) (3)

When the calculating of formula (2) and (3), use inboard summit focal power Po, datum curve Pb is used diopter (D), L and the thickness t of adjusting the distance used (m).”

Use the calculating formula of these lens multiplying powers SM calculate far away with portion with closely with the difference of magnification of portion, this difference of magnification is little in prior art 1, so the distortion of picture and rocking is enhanced.

Research according to the present inventor recognizes that it has certain effect to said prior art 1 with this prior art comparison, but in order to carry out more high performance lens design following point need be discussed also.

In a, the basic evaluating that in said prior art 1, uses,, comprise the nearby suitable parameter of central authorities of only tackling lens normally as knowing with the record of " thickness t of lens center " according to " from the summit of the face of lens eyeball side to the distance L of eyeball ".Promptly in the embodiment of prior art 1 only reply be positioned at the lens central authorities basic evaluating that far is suitable for portion nearby to be positioned at apart from the lens center far away below closely also become suitable with portion, so might residually cause error thus.

Added " refractive index ns of lens " said on other in b, the prior art 1, calculated the multiplying power SM of lens with 5 basic evaluatings.But consider in fact and will understand that the size of picture receives the strong influence of " angle of sight line and lens face " to the words that tilt to see before and after the lens of band width number at once.Therefore consider and to ignore this " angle of sight line and lens face " near the calculating that particularly is positioned at the below far away with portion's multiplying power apart from the lens center.Therefore " do not consider the angle of sight line and lens face and calculate the multiplying power of lens " caused error might be arranged in the lens design of prior art 1.

" multiplying power " in c, the prior art 1 do not have the notion of direction except on the books to the application examples of astigmat, thus for example be positioned at apart from the lens center below far away closely produce " longitudinal direction is different with the multiplying power of transverse direction " with portion the time might produce the error that causes thus.

D, in order correctly to carry out nearly multiplying power with portion is calculated, to the distance of looking target, promptly " object lens distance " must be appended as calculating factor, but and do not consider to be somebody's turn to do " object lens apart from " in the prior art 1, so can not negate the error that might so cause.

E,, multiplying power do not consider the influence of prismatic action in calculating, so might so cause error yet.

Like this, prior art is particularly carried out the visual angle that " multiplying power " calculate and is seen that it might be abundant from more accurate.

Summary of the invention

The present invention develops for solving this problem; Its purpose is to provide the influence of a kind of consideration " angle of sight line and lens face " and " object lens distance "; Reduce the difference of magnification with portion and near portion image far away through the multiplying power of correctly calculating picture, give the good vision of prescription values is proofreaied and correct and the double-sided aspheric focal power progressively increasing lens of the effective field of view of the broad range that distortion is few when using.

And its purpose is to provide a kind of as object side surface use " symmetrical semi-manufacture "; Can be only after accepting and order for goods the eyeball side surface as corresponding to myopia the asymmetric curved surface in the left and right sides of esotropia effect process, can reduce the double-sided aspheric focal power progressively increasing lens of process time and cost.

As the scheme that solves said problem; The application's scheme is a kind of manufacturing approach of double-sided aspheric focal power progressively increasing lens; This double-sided aspheric focal power progressively increasing lens possesses to separately distributing the effect that increases progressively focal power as first refractive surface of object side surface with as second refractive surface of eyeball side surface; It is characterized in that; Prepare processed semi-manufacture, demarcate and left-right symmetric so that said first refractive surface becomes by the meridian with number of degrees measuring position F1 far away through said first refractive surface, accept order after; Said second refractive surface is processed; The left and right sides is asymmetric so that said half-finished said second refractive surface becomes by demarcating through the meridian with number of degrees measuring position F2 far away of said second refractive surface, and the nearly configuration with number of degrees measuring position N2 of said second refractive surface only inwardly relies on nasal side by predetermined distance.

As the scheme that solves said problem; First scheme is that it is to possess to first refractive surface of object side surface and second refractive surface of eyeball side surface separately to distribute the double-sided aspheric focal power progressively increasing lens that increases progressively the focal power effect; In said first refractive surface; Be set at DHf, DVf to transverse direction surface light focal power and the longitudinal direction surface light focal power with number of degrees measuring position F1 far away respectively; In said first refractive surface, when being set at DHn, DVn to nearly transverse direction surface light focal power and longitudinal direction surface light focal power with number of degrees measuring position N1 respectively, satisfied

DHf+DHn＜DVf+DVn and DHn＜DVn

Relational expression, offset the surperficial astigmatism composition of said first refractive surface F1 and N1 at said second refractive surface simultaneously, combining said first and second refractive surfaces gives far away from the number of degrees (Df) and the adding number of degrees (ADD) according to prescription values.

Alternative plan is satisfying about this double-sided aspheric focal power progressively increasing lens of first scheme

DVn-DVf＞ADD/2 and DHn-DHf＜ADD/2

Relational expression.

Third party's case be first or alternative plan in double-sided aspheric focal power progressively increasing lens in; Its said first refractive surface handle is symmetrical through the meridian with number of degrees measuring position F1 far away as boundary; Said second refractive surface is the meridian with number of degrees measuring position F2 far away through this second refractive surface symmetrical as boundary, and the nearly configuration of this second refractive surface with number of degrees measuring position N1 only inwardly rely on nasal side by predetermined distance and with myopia the esotropia effect corresponding.

Cubic case is being through the surfaces of revolution of the meridian with number of degrees measuring position F1 far away as bus at first refractive surface described in the double-sided aspheric focal power progressively increasing lens of first～the 3rd arbitrary scheme; Said second refractive surface is the meridian with number of degrees measuring position F2 far away through this second refractive surface symmetrical as boundary, and the nearly configuration of this second refractive surface with number of degrees measuring position N2 only inwardly rely on nasal side by predetermined distance and with myopia the esotropia effect corresponding.

The 5th scheme is in the double-sided aspheric focal power progressively increasing lens of first～the 4th arbitrary scheme; Give according to prescription values far away with the number of degrees (Df) with add on the architecture basics of the number of degrees (ADD) combining said first and second refractive surfaces, the generation of the astigmatism of can not quadrature by the sight line of user mode and lens face and causing and the variation reduction of the number of degrees.

Such scheme be according to below the result that understands fully and motion.Following one side describes with reference to accompanying drawing on one side.Fig. 1 is the key diagram of the various surface light focal powers of each position, eyeglass lens surface; Fig. 2 is the key diagram of the position relation of eyeball and sight line and lens; Fig. 3-1, Fig. 3-2 and Fig. 3-3 and Fig. 4-1, Fig. 4-2 and Fig. 4-the 3rd about the key diagram of prism multiplying power M γ, are the different key diagrams of multiplying power when seeing with portion about the different and main use lens bottom that caused by positive lens and negative lens near, Fig. 5-the 1st, the key diagram of focal power progressively increasing lens optical layout; It is the front view (FV) of seeing from object side surface; Fig. 5-the 2nd, the key diagram of focal power progressively increasing lens optical layout is the outboard profile of expression longitudinal direction section, Fig. 5-the 3rd, the key diagram of focal power progressively increasing lens optical layout; Be the elevation drawing of expression transverse direction section, Fig. 6 is the different key diagram of definition of expression " the adding number of degrees ".Symbol F representes far to represent closely to represent prism number of degrees measuring position with number of degrees measuring position, Q with number of degrees measuring position, N in these figure.And other symbolic representations of being remembered among Fig. 1 etc. is:

DVf: the surface light focal power of the F of the longitudinal direction section curve through F

DVn: the surface light focal power of the N of the longitudinal direction section curve through N

DHf: the surface light focal power of the F of the transverse direction section curve through F

DHn: the surface light focal power of the N of the transverse direction section curve through N

In the refractive surface of figure additional subscript 1 on all symbol when being object side surface first refractive surface, when being eyeball side surface second refractive surface on all symbol additional subscript 2 with identification.

What symbol F1 and F2 represented is the number of degrees measuring position of using far away of object side surface and eyeball side surface, and what likewise N1 and N2 represented is the nearly number of degrees measuring position of using of object side surface and eyeball side surface.E is the expression eyeball, and C is the rotation center of expression eyeball, S be expression with C be the center with reference to sphere, Lf and Ln represent respectively through far away with number of degrees measuring position and nearly sight line with number of degrees measuring position.M is expression when watching with two to the below from positive top, the curve of the called line of regard of deciding that sight line is passed through.What F1, N1, F2, N2, N3 represented is the position that is contacted different lens meter peristomes by the definition difference of " the adding number of degrees ".

At first, " consideration object lens apart from " through " making parameter " of said prior art (a) problem and (d) problem corresponding to closely use portion improved corresponding to closely trying to achieve as follows with the dynameter formula of portion.Promptly be set at the focal power factor to Mp, when being set at form factor to Ms, as multiplying power SM use

SM＝Mp×Ms (1’)

Expression.At this; Be set at Px to object lens focal power (is the inverse of the object lens distance of unit representation with m), be L to the face of the eyeball side of closely using portion from lens to the distance setting of eyeball, closely being set at Po with the focal power (closely using the inboard summit focal power of portion) of portion to looking target; Closely use lens the thickness setting of portion to be t; Be set at n to the refractive index of lens, the datum curve (focal power) of closely using the face of portion's object side to lens is when being set at Pb, and following relation of plane is set up.

Mp＝(1-(L+t)Px)/(1-L×Po) (2’)

Ms＝1/(1-t×(Px+Pb)/n) (3’)

In these formulas, when making each parameter corresponding to far use portion, bring 0 o'clock corresponding to infinity into apart from the Px of focal power to representing object lens, then consistent with the numerical expression of said prior art 1.Be that the numerical expression that uses in the prior art 1 is the special-purpose numerical expression of long sight of considering infinity object lens distance.At this, (1 ') numerical expression with said prior art 1 is identical, and the object lens distance of general myopia is about 0.3m～0.4m, so its Px reciprocal is about-2.5～-3.0 value.Therefore molecule has increased in (2 '), so Mp increases, denominator has increased in (3 '), so Ms reduces.Know that promptly the influence of near-sighted form factor Ms lacks than the calculating of prior art 1.For example at Pb=-Px, promptly the datum curve of the face of lens object side (focal power) be+during about 2.5～+ 3.0 value, Ms=1 recognizes that the form factor of myopia and the multiplying power of picture have no relations fully.

As above make each parameter also consider the dynameter formula of " object lens distance " corresponding to closely using portion, can obtaining, but then must further also consider " angle of sight line and lens face " of prior art 1 (b) problem in order to calculate actual near-sighted multiplying power.This importantly " angle of sight line and lens face " be directive.Promptly consider " angle of sight line and lens face " be nothing but said prior art 1 (c) problem " as multiplying power " directivity consider simultaneously.

When reappraising first calculating formula of said (1 ')～(3 '),, have nearly inboard summit focal power Po and datum curve (focal power) Pb of nearly face with portion's object side with portion as the calculating factor that " angle of sight line and lens face " influenced with this viewpoint.Sight line in this myopia is set at α with nearly optical axis angulation with the portion zone; When being set at β to the sight line of myopia with nearly normal angulation with portion's object side surface; When Martin approximate expression that use is known, then become nearly inboard summit focal power with portion's longitudinal direction:

Pov＝Po×(1+Sin2α×4/3)

Nearly inboard summit focal power with portion's transverse direction:

Poh＝Po×(1+Sin2α×1/3)

Nearly longitudinal profile focal power with portion's object side surface:

Pbv＝Pb×(1+Sin2β×4/3)

Nearly transverse section focal power with portion's object side surface:

Pbh＝Pb×(1+Sin2β×1/3)

As long as like this angle α and β, and Po is not zero with Pb, and then focal power is exactly different in length and breadth values with focal power factor, form factor etc., and consequently generation is poor on the multiplying power of longitudinal direction and transverse direction.

Used approximate expression at this for simple declaration " according to the direction of sight line and power variation ", tried to achieve these values but in the optical design of reality, preferably calculate through tight ray tracing.Non-limiting example as these computing method; For example use Snell law to calculate light path along sight line; Calculate L, t and distance from the object side plane of refraction to object point; Then along the first fundamental form of this light path through using differential geometry, second fundamental form, Weingarten formula etc., just can calculate and consider the object side plane of refraction and the focal power of refractive effect on eyeball side plane of refraction light path.These formulas and computing method are very early by known, for example in known document " differential geometry " (vowing wild Itou Kentaro work, bookstore's distribution towards the storehouse, first edition in 1949) waits, have said, so the omission explanation.

Calculate through carrying out this tight ray tracing; These 4 calculating of L, Po, t, Pb factor to said (a)～(d) problem has also been considered; Apart from the below far away of lens center closely certainly much less with portion, carrying out on all direction of visual lines that tight dynameter is counted as is possible.Like this to said project

Nearly inboard summit focal power: Pov with portion's longitudinal direction

Nearly inboard summit focal power: Poh with portion's transverse direction

Nearly longitudinal profile focal power: Pbv with portion's object side surface

Nearly transverse section focal power: Pbh with portion's object side surface

Just than trying to achieve with higher precision with the Martin approximate expression.

Like this, also just easily understand from " according to the direction of sight line and power variation ", even the multiplying power of described picture is calculated the difference that also is fit to all direction of visual lines of reply.At this, as the focal power factor, as form factor, longitudinal direction is enclosed subscript v to Mp to Ms, when transverse direction was enclosed subscript h, to the multiplying power SM of picture, then described (1 ')～(3 ') formula can be rewritten as follows.

SMv＝Mpv×Msv (1v’)

SMh＝Mph×Msh (1h’)

Mpv＝(1-(L+t)Px)/(1-L×Pov) (2v’)

Mph＝(1-(L+t)Px)/(1-L×Poh) (2h’)

Msv＝1/(1-t×(Px+Pbv)/n) (3v’)

Msh＝1/(1-t×(Px+Pbh)/n) (3h’)

More than so can tackle the problem of said prior art 1 from (a) to (d).At last, on the basis of calculating actual near-sighted multiplying power " influence of prismatic action " of narration said (e) problem.Though there is not the focal power as lens in this prism, the multiplying power M γ that injects angle prism with penetrating angle to prism is changing through light.At this,, be thought of as γ to the angular magnification of the light of from vacuum, in the medium of refractive index n, injecting when dielectric surface reflects like the left side of Fig. 3-1 and Fig. 4-1.Being set at i to incident angle at this moment, when being set at r to the refraction angle, through knowing the Snell law, is n=Sin i/Sin r.The angular magnification γ of refraction representes with γ=Cos i/Cos r.Because n>=1, so generally become i>=r, γ≤1.At this, it is i=r=0 that γ becomes maximal value 1, situation about promptly vertically injecting.When refraction angle r becomes n=1/Sin r then γ be theoretic minimum value, γ=0.At this moment i=pi/2, the critical angle of the total reflection when r equals from medium, to come out light.

On the other hand, like the right side of Fig. 3-1 and Fig. 4-1, the angular magnification γ ' that goes into when light penetrates to vacuum from the medium of refractive index n is with above-mentioned opposite fully.Promptly from medium inside in dielectric surface refraction and the incident angle when light penetrates to vacuum is set at i ', when being set at r ' to the refraction angle, the Snell law is 1/n=Sin i '/Sin r '.Angular magnification is to use γ '=Cos i '/Cos r ' expression.Because n >=1, so generally become r ' >=i ', γ ' >=1.At this, it is i '=r '=0 that γ ' becomes minimum value 1, situation about promptly vertically injecting.When incident angle i ' becomes n=1/Sin i ' then γ ' be theoretic maximal value, γ '=∞.At this moment r '=pi/2, i ' equal the critical angle of the total reflection when the Light in Medium line comes out.

Like Fig. 3-3 and Fig. 4-3; The rays pass through lens that consideration is injected to the object side surface of a slice eyeglass lens is inner, from the eyeball side surface penetrate the situation that the back arrives eyeball (later on for the simplification of explaining the refractive index of air be thought of as with vacuum to be similar to be 1 identically).The eyeglass lens refractive index as n; incident angle from light to object side surface that inject as i; The refraction angle as r; From the inner incident angle that arrives eyeball side surface light of lens as i ', during as r ', the angular magnification M γ on two surfaces of transmission eyeglass lens is with the product representation of said two kinds of angular magnifications irradiant refraction angle.Become:

Mγ＝γ×γ’＝(Cos?i×Cos?i’)/(Cos?r×Cos?r’)。

The focal power of this and lens surface is irrelevant, but is known as the multiplying power of prism.

Like Fig. 3-1 and Fig. 4-1, consider i=r ' at this, then become during r=i ':

Mγ＝γ×γ’＝1

The multiplying power that becomes the picture of seeing through prism does not change.Like Fig. 3-2, vertically when the object side surface of eyeglass lens is injected, become at light:

Mγ＝γ’＝Cos?i’/Cos?r’≥1

On the contrary, like Fig. 4-2, when the eyeball side surface of eyeglass lens vertically penetrates, become at light:

Mγ＝γ＝Cos?i/Cos?r≤1

At this, importantly the multiplying power M γ of these prisms is directive.Promptly when the prism of considering focal power progressively increasing lens distributes, certainly will be with the number of degrees and prescription prism values different and different, it is few near the prism of the central long sight of lens that the chances are, and big to the prism of the longitudinal direction that is positioned at the myopia below the lens.Therefore the multiplying power M γ that we can say prism particularly influences big to the longitudinal direction of myopia.

Be not only focal power progressively increasing lens; And eyeglass lens generally all is that the composite body side surface is protruding, and the eyeball side surface is recessed concave-convex lens shape, and when to merge the sight line of considering myopia be downward; Then shown in Fig. 3-3; Having near is the myopia of the focal power progressively increasing lens of positive light coke with portion, than the shape that Fig. 3-1 of M γ=1 more approaches Fig. 3-2 of M γ >=1, we can say it is M γ＞1 at least.Likewise, shown in Fig. 4-3, having near is the myopia of the focal power progressively increasing lens of negative power with portion, than the shape that Fig. 4-1 of M γ=1 more approaches Fig. 4-2 of M γ≤1, we can say it is M γ＜1 at least.Therefore, having near is the myopia of the focal power progressively increasing lens of positive light coke with portion, its M γ＞1, and having near is the myopia of the focal power progressively increasing lens of negative power with portion, its M γ＜1.

The lens multiplying power SM of said prior art 1 is only to grasp as focal power factor Mp and amassing of form factor Ms as previously mentioned, and relative therewith, the present invention is the multiplying power M γ that further is multiplied by prism, expects correct lens multiplying power.

From the multiplying power M γ that produces by this prism and Mp and Ms contrast, be referred to as " prism factor ", the subscript that longitudinal direction is added v when the subscript that transverse direction is added h is represented, is then rewritten described (1v ') and (1h ') formula the multiplying power SM of picture as follows.

SMv＝Mpv×Msv×Mγv (1v”)

SMh＝Mph×Msh×Mγh (1h”)

These M γ v and M γ h can try to achieve in said tight ray trace process.So just can solve the problem of prismatic action influence in the said glasses multiplying power calculating.

In the common convex surface focal power progressively increasing lens, the surface light focal power that object side surface " increases progressively face " is far to use portion of portion＜closely use.Therewith relatively; The focal power progressively increasing lens of said prior art 1 becomes far away from portion etc. of portion=closely use through the surface light focal power that " increases progressively face to object side surface "; Change the ratio of far and near form factor; Reduce the difference of magnification of far and near picture, with the distortion of the picture that improves focal power progressively increasing lens with rock.But in investigation of the present invention, recognize, through reducing the object side surface far and near surperficial difference in power that " increases progressively face ", the advantage that has the difference of magnification of the far and near picture of transverse direction to reduce, but on the surperficial difference in power minimizing of longitudinal direction, several problems are arranged.

First problem is the influence of the prism factor M γ v of longitudinal direction.As previously mentioned; The prism factor M γ v of longitudinal direction is M γ v＜1 when having negative power; Be M γ v＞1 when having positive light coke, grow all departs from the nearly number of degrees with portion to this tendency from the multiplying power M γ v=1 of bore hole under positive and negative arbitrary situation by reducing the surperficial difference in power of longitudinal direction.And the prism factor M γ h of transverse direction is not just had this influence, former state ground M γ h=1.Consequently, particularly poor in length and breadth to closely producing with the multiplying power of the picture of subordinate side, produce and should regard foursquare thing originally as and regard lengthwise as by the positive number of degrees, regard the bad situation of growing crosswise as by the negative number of degrees.

Second problem is the problem that only when particularly closely having positive light coke with the longitudinal direction of portion, just occurs.The sight line of myopia and the angle of lens face become more oblique by the surperficial difference in power that reduces longitudinal direction exactly; Focal power factor Mpv through said longitudinal direction increases; And be the double action that increases of the longitudinal direction prism factor M γ v of first problem and the multiplying power SMv of longitudinal direction increases, produce the bad situation that the difference of magnification of far and near picture increases on the contrary.

Promptly recognizing, reduce the far and near surperficial difference in power that object side surface increases progressively face, is advantage to transverse direction, but to longitudinal direction be on the contrary change bad.The convex surface focal power progressively increasing lens of therefore existing type is to be divided into longitudinal direction and transverse direction to the face that increases progressively of object side surface, only transverse direction is reduced far and near surperficial difference in power, can avoid said problem.

These are described below, and are also identical to " visual field is broad " that increase progressively (or concave surface increases progressively) advantage inside generally being.

Generally there is astigmatism in the sidepiece " increasing progressively face "; So know the good visual field of horizontal direction boundary is arranged; But as long as be configured in the eyeball side surface to " increasing progressively face ", then be somebody's turn to do " increasing progressively face ", produce the good broad in the horizontal direction advantage in the visual field just near eye.But there is far and near area of visual field to stretch result far away in vertical direction, produces eyeball from the long sight bad situation that the labour increases when myopia is rotated.Promptly the inside increases progressively (or concave surface increases progressively) and increases progressively (or convex surface increases progressively) with existing surface and compare, though wide-field in the horizontal direction advantage is arranged, the shortcoming of eyeball rotation angle increase when having from long sight to myopia in vertical direction.

But the present invention as previously mentioned; Possesses the DHf+DHn of satisfying＜DVf+DVn; And DHn＜DVn, or DVn-DVf＞ADD/2, and DHn-DHf＜ADD/2 relational expression increase progressively the focal power surface; So the existing surface of aspect ratio that increases progressively (or concave surface increases progressively), the inside characteristic that increases progressively (or convex surface increases progressively) is eager to excel in the horizontal direction, and existing in vertical direction surface increases progressively the characteristic that the aspect ratio the inside of (or convex surface increases progressively) increases progressively (or concave surface increases progressively) and is eager to excel.Therefore according to the present invention, on enjoying horizontal direction, in the wide-field advantage, can suppress the shortcoming that far and near in vertical direction eyeball rotation angle increases.

As the more extreme example of category of the present invention, as long as DVn-DVf=ADD, and DHn-DHf=0, then to increase progressively (or convex surface increases progressively) identical with existing surface in vertical direction, and increase progressively (or concave surface increases progressively) in the horizontal direction with the inside identical.Therefore just become the shortcoming that does not only have on the vertical direction but also can obtain the extremely good result of the advantage on the horizontal direction in this situation.

These are reducing far from the difference of magnification of portion with nearly picture with portion as previously mentioned, and it also is same improving the distortion of picture and rocking, and can be described as advantage of the present invention.

As stated; The maximum characteristics of the present invention are to be; The effect that increases progressively about focal power progressively increasing lens; It on the basis that the longitudinal direction and the transverse direction of lens separate, all directions stipulated only front, the sharing ratio of two sides, the inside and constituted a slice double-sided aspheric focal power progressively increasing lens.For example as extreme example, acting on whole giving body side surface to increasing progressively of longitudinal direction, all give the eyeball side surface effect that increases progressively of transverse direction, also is category of the present invention.At this moment, the front of lens, two sides, the inside are not all only played common conduct with single face and are increased progressively face, so can not specific conduct increase progressively the adding number of degrees of face.Promptly becoming the table the inside is not the focal power progressively increasing lens that increases progressively face.Relatively; Although said various prior art is shared the ratio difference; But all be to distribute to front, two sides, the inside to " value " of the necessary adding number of degrees, increase progressively on the basis of face, constitute the synthetic face of astigmatic face etc. more as required in imaginary each essence that adds the number of degrees.Be that the present invention and the conclusive difference of said prior art are, use on the two sides having, and constitute double-sided aspheric focal power progressively increasing lens with the different and different aspheric surface that increases progressively effect of direction.

Description of drawings

Fig. 1 is the key diagram of the various surface light focal powers of each position, eyeglass lens surface;

Fig. 2 is the key diagram of the position relation of eyeball and sight line and lens;

Fig. 3-the 1st about the key diagram of prism multiplying power M γ, is the different key diagram of multiplying power when seeing with portion about the different and main use lens bottom that caused by positive lens and negative lens near;

Fig. 3-the 2nd about the key diagram of prism multiplying power M γ, is the different key diagram of multiplying power when seeing with portion about the different and main use lens bottom that caused by positive lens and negative lens near;

Fig. 3-the 3rd about the key diagram of prism multiplying power M γ, is the different key diagram of multiplying power when seeing with portion about the different and main use lens bottom that caused by positive lens and negative lens near;

Fig. 4-the 1st about the key diagram of prism multiplying power M γ, is the different key diagram of multiplying power when seeing with portion about the different and main use lens bottom that caused by positive lens and negative lens near;

Fig. 4-the 2nd about the key diagram of prism multiplying power M γ, is the different key diagram of multiplying power when seeing with portion about the different and main use lens bottom that caused by positive lens and negative lens near;

Fig. 4-the 3rd about the key diagram of prism multiplying power M γ, is the different key diagram of multiplying power when seeing with portion about the different and main use lens bottom that caused by positive lens and negative lens near;

Fig. 5-the 1st, the key diagram of focal power progressively increasing lens optical layout is a front view (FV) of seeing focal power progressively increasing lens from object side surface;

Fig. 5-the 2nd, the key diagram of focal power progressively increasing lens optical layout is the outboard profile of expression longitudinal direction section;

Fig. 5-the 3rd, the key diagram of focal power progressively increasing lens optical layout is the elevation drawing of expression transverse direction section;

Fig. 6 is the different key diagram of definition of expression " the adding number of degrees ";

Fig. 7 collects in the figure that table 1-1 and table 1-2 represent to

embodiment

1,4,5,6 and the prior art A corresponding with each number of degrees, B, C " surface light focal power " and " specific direction of visual lines is carried out tight multiplying power result of calculation ";

Fig. 8 collects in the figure that table 2-1 and table 2-2 represent to embodiment 2,7 and the prior art A corresponding with each number of degrees, B, C " surface light focal power " and " specific direction of visual lines is carried out tight multiplying power result of calculation ";

Fig. 9 collects in the figure that table 3-1 and table 3-2 represent to embodiment 3 and the prior art A corresponding with its number of degrees, B, C " surface light focal power " and " specific direction of visual lines is carried out tight multiplying power result of calculation ";

Figure 10 is the figure that representes Fig. 1-1,1-2,2-1, the 2-2 of expression embodiment 1 and embodiment 2 surface light power profile;

Figure 11 is Fig. 3-1 of expression embodiment 3 surface light power profile, the figure that 3-2 representes;

Figure 12 is the figure that representes Fig. 4-1,4-2,5-1,5-2,6-1, the 6-2 of expression embodiment 4～6 surface light power profile;

Figure 13 is Fig. 7-1 of expression embodiment 7 surface light power profile, the figure that 7-2 representes;

Figure 14 is the figure that representes figure A-1, A-2, B-1, B-2, C-1, the C-2 of expression prior art A, B, C surface light power profile;

Figure 15 is the figure that Fig. 1-3-Msv of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 1 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard;

Figure 16 is the figure that Fig. 1-3-Msh of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 1 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard;

Figure 17 is the figure that Fig. 1-3-Mpv of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 1 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard;

Figure 18 is the figure that Fig. 1-3-Mph of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 1 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard;

Figure 19 is that the multiplying power when seeing the lens of expression embodiment 1 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard distributes and carries out the tight multiplying power calculating result's that tries to achieve the figure that Fig. 1-3-M γ v representes;

Figure 20 is that the multiplying power when seeing the lens of expression embodiment 1 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard distributes and carries out the tight multiplying power calculating result's that tries to achieve the figure that Fig. 1-3-M γ h representes;

Figure 21 is the figure that Fig. 1-3-SMv of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 1 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard;

Figure 22 is the figure that Fig. 1-3-SMh of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 1 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard;

Figure 23 is the figure that Fig. 2-3-Msv of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 2 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard;

Figure 24 is the figure that Fig. 2-3-Msh of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 2 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard;

Figure 25 is the figure that Fig. 2-3-Mpv of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 2 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard;

Figure 26 is the figure that Fig. 2-3-Mph of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 2 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard;

Figure 27 is that the multiplying power when seeing the lens of expression embodiment 2 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard distributes and carries out the tight multiplying power calculating result's that tries to achieve the figure that Fig. 2-3-M γ v representes;

Figure 28 is that the multiplying power when seeing the lens of expression embodiment 2 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard distributes and carries out the tight multiplying power calculating result's that tries to achieve the figure that Fig. 2-3-M γ h representes;

Figure 29 is the figure that Fig. 2-3-SMv of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 2 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard;

Figure 30 is the figure that Fig. 2-3-SMh of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 2 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard;

Figure 31 is the figure that Fig. 3-3-Msv of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 3 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard;

Figure 32 is the figure that Fig. 3-3-Msh of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 3 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard;

Figure 33 is the figure that Fig. 3-3-Mpv of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 3 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard;

Figure 34 is the figure that Fig. 3-3-Mph of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 3 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard;

Figure 35 is that the multiplying power when seeing the lens of expression embodiment 3 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard distributes and carries out the tight multiplying power calculating result's that tries to achieve the figure that Fig. 3-3-M γ v representes;

Figure 36 is that the multiplying power when seeing the lens of expression embodiment 3 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard distributes and carries out the tight multiplying power calculating result's that tries to achieve the figure that Fig. 3-3-M γ h representes;

Figure 37 is the figure that Fig. 3-3-SMv of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 3 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard;

Figure 38 is the figure that Fig. 3-3-SMh of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 3 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard.

Embodiment

The both-sided aspherical of the explanation embodiment of the invention increases progressively refractor below.Be illustrated as at first in the explanation below that the both-sided aspherical that obtains embodiment increases progressively refractor and the method for designing used, the both-sided aspherical of illustrative embodiment increases progressively refractor then.

(order of lens design)

The cardinal principle order that the embodiment both-sided aspherical increases progressively the refractor optical design method as follows.

1. the setting of input information

2. design as the two sides of protruding focal power progressively increasing lens

3. to the conversion of convex shape of the present invention with follow its inside to proofread and correct

4. transmission design, proofread and correct according to the inside of the corresponding design of listing's law rule etc.

Resolving into more detailed step to each in proper order below details.

1. the setting of input information

Input information is divided into following two types (omissions beyond the optical design) substantially.

1.-1: the project intrinsic information

It is the intrinsic data of lens project.Be the refractive index Ne of raw material, minimum center wall thickness CTmin, the thick ETmin in minimum edge (コバ), increase progressively face design parameter etc.

1.-2: user's intrinsic information

It is far use the number of degrees (spherical degree S, astigmatism degree C, astigmatism axle AX, prism number of degrees P,

Prism substrate direction PAX etc.), add distance between number of degrees ADD, spectacle frame shape data (preferably three-dimensional shape data), spectacle frame installation data (top rake, angle of oscillation (ぁぉり angle) etc.), summit, topology data (far with PD, closely use CD, position of eye point etc.), other are about the data of eyeballs etc.And by the increasing progressively belt length (progression belt length) and add number of degrees measuring method of user's appointment, closely the face design parameter that increases progressively with the inside side-play amount of portion etc. is classified as user's intrinsic information.

Initial focal power progressively increasing lens as existing type is separated into convex surface and concave surface designs.

2.-1: convex shape (the protruding face that increases progressively) design

For the adding number of degrees ADD that realizes giving as input information with increase progressively belt length, according to the protruding face shape that increases progressively that the face design parameter designs existing type that increases progressively of input information.In the design of this step, can utilize existing various known technology, and not need designing technique of the present invention.

As the concrete example of this method, for example at first when constituting lens face at first, be equivalent to the establishing method of spine " principal meridian ".Should " principal meridian " preferably finally be set at be equivalent to the glasses user from positive top (distant place) to the below " the main line of regard " of the intersection of sight line when (nearby) watches with two and lens face.But corresponding to the reply of the proximal region of the esotropia effect of the eye of myopia to bias internal etc., of the back, not necessarily need be somebody's turn to do the inside offset configuration of " main line of regard ".Therefore, a meridian (principal meridian) of the longitudinal direction about this " main line of regard " is to be separated into as scioptics central authorities and lens face defines.Lens are surface, two sides, the inside, so should " principal meridian " also have two of front, the insides.What should " principal meridian " when lens face is vertically seen, see is linearity, but lens face is when being curved surface, is the curve at solid space as the one of which.

Serve as that the basis is set along the appropriate optical power profile of being somebody's turn to do " principal meridian " with the adding number of degrees of stipulating and the information such as length that increase progressively band below.This optical power profile is considered the influence of the thickness of lens and the angle of sight line and plane of refraction etc.; Also can positive, the two sides, the inside separate and set; The design of this step is the protruding face shape that increases progressively of the existing type of design, so increase progressively effect fully on first refractive surface that is object side surface.Therefore for example the surface light focal power of the surface of lens (first refractive surface of object side surface) as D1; The surface light focal power of the inside of lens (second refractive surface of eyeball side surface) as D2; During as D, usually can be similar to the transmitted light focal power that obtains and try to achieve as D ≈ D1-D2.But the combination of D1 and D2 preferably object side surface is protruding, and the eyeball side surface is recessed concave-convex lens shape.This to note D2 be on the occasion of.Usually the inside of lens is concave surfaces, is negative value as the surface light focal power, but this instructions in order to explain simple it be set on the occasion of, deduct and calculate transmitted light focal power D from D 1.

The relational expression of this surface light focal power and surface configuration generally defines with following formula

Dn＝(N-1)/R

At this, Dn: the surface light focal power of n face (unit: diopter), N: the refractive index of lens raw material, R: radius-of-curvature (unit: m).Therefore, the method that is converted into curvature distribution to the distribution of surface light focal power is just used and has been out of shape the above-mentioned relation formula:

1/R＝Dn/(N-1)。

Distribution through obtaining curvature then " principal meridian " geometric shape really is set at univocality, and " principal meridian " that be equivalent to spine when constituting lens face be set.

That need below is " the section curve crowd of horizontal direction " who is equivalent to rib when constituting lens face.These " section curve crowds of horizontal direction " and " principal meridian " crossing angle not necessarily need be the right angles, but simple in order to explain, are set on " principal meridian " at this each " section curve of horizontal direction " to meet at right angle.With " principal meridian " intersection point on " the section curve crowd of horizontal direction " " transverse direction surface light focal power " also not necessarily need with equate along " the longitudinal direction surface light focal power " of " principal meridian "; Of technical scheme of the present invention now, the present invention is that to be based on the surface light focal power of longitudinal direction and transverse direction be different.But the design of this step is the protruding face shape that increases progressively of the existing type of design, equates with the surface light focal power of transverse direction so be set at the longitudinal direction of these intersection points.

It is the simple circular curve that on these intersection points, has the surface light focal power that all " section curves of horizontal direction " can be set at, also can be the application that combines of various prior art groups.As the prior art example of relevant surface light power profile along " section curve of horizontal direction ", the technology of special public clear 49-3595 is for example arranged.Be characterized in nearby setting " section curve of horizontal direction " of a circular shape in the central authorities of lens; The section curve that is positioned at its top position has the surface light power profile that from central authorities to the side, increases, and the section curve that is positioned at its lower position has the surface light power profile that from central authorities to the side, reduces.Like this, " principal meridian " and on it countless " section curve crowds of horizontal direction " arranged side by side with regard to just like spine and rib and constitute lens face have been confirmed plane of refraction.

2.-2: concave (sphere or astigmatic face) design

For the concave that designs with the number of degrees far away that realizes giving as input information.Far away then is astigmatic face with the words that astigmatism degree is arranged on the number of degrees, if then be not sphere.At this moment the also pitch angle of the mutual face of the center wall thickness CT that is suitable for the number of degrees of design simultaneously and convex surface and concave surface, definite shape as lens.The design of this step also can utilize existing various known technology, does not need designing technique of the present invention.

Far away according to what give with the number of degrees and adding number of degrees ADD etc. as input information, change to shape from the protruding focal power progressively increasing lens of existing type as lens of the present invention.

3.-1: convex shape (the present invention) design

Far away according to what give with the number of degrees and adding number of degrees ADD etc. as input information, increase progressively towards convex shape conversion of the present invention from the protruding of existing type.Promptly on the protruding surface (first refractive surface of object side surface) that increases progressively lens of said existing type; Far with the transverse direction surface light focal power of number of degrees measuring position F1 be set at DHf, longitudinal direction surface light focal power is set at DVf; Be set at nearly transverse direction surface light focal power DHn, when longitudinal direction surface light focal power is set at DVn, be set at satisfied with number of degrees measuring position N1

DHf+DHn＜DVf+DVn and DHn＜DVn relational expression or satisfied

The focal power progressively increasing surface of DVn-DVf＞ADD/2 and DHn-DHf＜ADD/2 relational expression.At this moment preferably change to convex shape of the present invention unchangeably with the average surface focal power of whole convex surface.For example consider to keep the vertical mean value with portion and the nearly focal power of surface light in length and breadth with portion far away etc.But preferably in that to keep object side surface be protruding and the eyeball side surface is in the scope of recessed concave-convex lens shape.

3.-2: concave (the present invention) design

Be added to the deflection when existing type protruding increases progressively towards convex shape conversion of the present invention in 3. said-1 the concave of 2.-2 design.Promptly, only also be added on the inside (second refractive surface of eyeball side surface) of lens with identical amount the surface of added lens in the processing 3.-1 (first refractive surface of object side surface) deflection.This distortion is with similar this lens crooked " adjustment of writing music for a song ", but will note not being homogeneous deformation on whole, but as satisfied 3.-1 described in the surface of relational expression.Proofread and correct these the insides is category of the present invention, but only is that first-order approximation is proofreaied and correct, and preferably proofreaies and correct the inside 4. to add.

4. according to the corresponding design of transmission design, listing's law rule, closely with the inside correction of portion to the corresponding design of bias internal etc.

In order under the actual behaviour in service of user, to realize the optical function that distributes as input information, preferably the lens of the present invention that in 3., obtain are further added the inside correction.

4.-1: be used for concave (the present invention) design of transmission design

So-called transmission design is in order to make the user use the method for designing that obtains original optical function under the situation of lens in reality, and it mainly is to remove astigmatism and the number of degrees variation of can not quadrature by sight line and lens face and causing generation or reduce the method for designing that " corrective action " of usefulness adds.

Concrete calculate through tight ray trace then as previously mentioned, grasp and difference, implement to eliminate the face of this difference and proofread and correct as the original optical function of purpose according to direction of visual lines.Through making the difference minimization to it repeatedly, can obtain best separating.In general, calculate directly that to have the lens shape that is the objective optics function be unusual difficulty, be mostly in fact impossible.This is because " lens shape with optical function of any setting " its physical presence is hard-core cause.But obtain in contrast, " optical function of the lens shape of setting arbitrarily " than being easier to.Therefore; Calculate the first approximation face with initial arbitrary method temporarily; According to the said design parameter of lens shape optical property evaluation result inching that has used this approximate face; Change lens shape gradually and return evaluation procedure, revalue repeatedly with again the adjustment just can to the objective optics performance near.This method is called " optimization " and by an example of the method for likewise known.

4.-2: concave (the present invention) design of corresponding listing's law design usefulness

The stereo rotating motion of knowing eyeball when we look around on every side is to follow the rule that is called " listing's law "; But when in the prescription number of degrees astigmatism degree being arranged; Even then aim at the astigmatism axle of eyeglass lens with " the astigmatism axle of the eyeball that the front is looked "; But in that also both astigmatism axles are inconsistent sometimes when periphery is seen; By this when periphery is seen lens and the variation of generation and the number of degrees of the inconsistent caused astigmatism of astigmatic direction of principal axis of eye eliminate or reduce " corrective action " of usefulness, can be added on the curve on surface of lens of the present invention with astigmatism correction active side.

Specifically be exactly, with 4.-1 in " optimization " method of using the same, calculate through tight ray trace according to direction of visual lines, grasp and difference as the original optical function of purpose, implement to eliminate the face of this difference and proofread and correct.Through making the difference minimization to it repeatedly, can obtain best separating.

4.-3: corresponding concave (the present invention) design of closely using with the inside offset design of portion

The present invention is the face structure of both-sided aspherical, but obtains not necessarily need after accepting and order for goods, beginning to carry out two sides processing again in the effect of the present invention.For example prepare " semi-manufacture " of the object side surface that is fit to the object of the invention in advance; " semi-manufacture " of the object side surface that the number of degrees and the said article made to order purposes such as (individual design) from them, selected and write out a prescription in the back of accepting and order for goods is fit to; After accepting and order for goods, only machine the eyeball side surface, this is useful on the point of cost and process velocity.

Concrete example as this method; For example in 3. said-1 convex shape (the present invention) design; Prepare object side surface in advance as symmetrical " semi-manufacture "; After importing the interocular distance and the personal information such as object lens distance of myopia, design the eyeball side surface as the asymmetric curved surface in the left and right sides of achieving the goal, so just can carry out corresponding with personal information near with portion to bias internal.

In the face of reflecting the embodiment that increases progressively lens, the both-sided aspherical with said designing method describes on one side with reference to accompanying drawing on one side down.Fig. 7 collects in the figure that table 1-1 and table 1-2 represent to embodiment 1,4,5,6 and the prior art A corresponding with each number of degrees, B, C " surface light focal power " and " specific direction of visual lines is carried out tight multiplying power result of calculation "; Fig. 8 collects in the figure that table 2-1 and table 2-2 represent to embodiment 2,7 and the prior art A corresponding with each number of degrees, B, C " surface light focal power " and " specific direction of visual lines is carried out tight multiplying power result of calculation "; Fig. 9 collects in the figure that table 3-1 and table 3-2 represent to embodiment 3 and the prior art A corresponding with its number of degrees, B, C " surface light focal power " and " specific direction of visual lines is carried out tight multiplying power result of calculation "; Figure 10 is the figure that representes Fig. 1-1,1-2,2-1, the 2-2 of expression embodiment 1 and embodiment 2 surface light power profile; Figure 11 is Fig. 3-1 of expression embodiment 3 surface light power profile, the figure that 3-2 representes; Figure 12 is the figure that representes Fig. 4-1,4-2,5-1,5-2,6-1, the 6-2 of expression embodiment 4～6 surface light power profile; Figure 13 is Fig. 7-1 of expression embodiment 7 surface light power profile, the figure that 7-2 representes, Figure 14 is the figure that representes figure A-1, A-2, B-1, B-2, C-1, the C-2 of expression prior art A, B, C surface light power profile.

Figure 15 is the figure that Fig. 1-3-Msv of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 1 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard; Figure 16 is the figure that Fig. 1-3-Msh of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 1 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard; Figure 17 is the figure that Fig. 1-3-Mpv of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 1 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard; Figure 18 is the figure that Fig. 1-3-Mph of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 1 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard; Figure 19 is that the multiplying power when seeing the lens of expression embodiment 1 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard distributes and carries out the tight multiplying power calculating result's that tries to achieve the figure that Fig. 1-3-M γ v representes; Figure 20 is that the multiplying power when seeing the lens of expression embodiment 1 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard distributes and carries out the tight multiplying power calculating result's that tries to achieve the figure that Fig. 1-3-M γ h representes; Figure 21 is that the multiplying power when seeing the lens of expression embodiment 1 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard distributes and carries out tight multiplying power and calculate the figure that Fig. 1-3-SMv of the result that tries to achieve representes, Figure 22 is that the figure that Fig. 1-3-SMh of the tight multiplying power calculating result that tries to achieve representes is carried out in the multiplying power distribution when seeing the main line of regard in lens edge of expression embodiment 1 and three kind prior aries example As corresponding with its number of degrees, B, C.

Figure 23 is the figure that Fig. 2-3-Msv of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 2 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard; Figure 24 is the figure that Fig. 2-3-Msh of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 2 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard; Figure 25 is the figure that Fig. 2-3-Mpv of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 2 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard; Figure 26 is the figure that Fig. 2-3-Mph of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 2 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard; Figure 27 is that the multiplying power when seeing the lens of expression embodiment 2 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard distributes and carries out the tight multiplying power calculating result's that tries to achieve the figure that Fig. 2-3-M γ v representes; Figure 28 is that the multiplying power when seeing the lens of expression embodiment 2 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard distributes and carries out the tight multiplying power calculating result's that tries to achieve the figure that Fig. 2-3-M γ h representes; Figure 29 is that the multiplying power when seeing the lens of expression embodiment 2 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard distributes and carries out tight multiplying power and calculate the figure that Fig. 2-3-SMv of the result that tries to achieve representes, Figure 30 is that the figure that Fig. 2-3-SMh of the tight multiplying power calculating result that tries to achieve representes is carried out in the multiplying power distribution when seeing the main line of regard in lens edge of expression embodiment 2 and three kind prior aries example As corresponding with its number of degrees, B, C.

Figure 31 is the figure that Fig. 3-3-Msv of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 3 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard; Figure 32 is the figure that Fig. 3-3-Msh of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 3 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard; Figure 33 is the figure that Fig. 3-3-Mpv of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 3 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard; Figure 34 is the figure that Fig. 3-3-Mph of carrying out the tight multiplying power calculating result that tries to achieve representes that distributes of the multiplying power when seeing the lens of expression embodiment 3 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard; Figure 35 is that the multiplying power when seeing the lens of expression embodiment 3 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard distributes and carries out the tight multiplying power calculating result's that tries to achieve the figure that Fig. 3-3-M γ v representes; Figure 36 is that the multiplying power when seeing the lens of expression embodiment 3 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard distributes and carries out the tight multiplying power calculating result's that tries to achieve the figure that Fig. 3-3-M γ h representes; Figure 37 is that the multiplying power when seeing the lens of expression embodiment 3 and corresponding with its number of degrees three kinds of prior aries example A, B, C along main line of regard distributes and carries out tight multiplying power and calculate the figure that Fig. 3-3-SMv of the result that tries to achieve representes, Figure 38 is that the figure that Fig. 3-3-SMh of the tight multiplying power calculating result that tries to achieve representes is carried out in the multiplying power distribution when seeing the main line of regard in lens edge of expression embodiment 3 and three kind prior aries example As corresponding with its number of degrees, B, C.

Embodiment 1

The table 1-1 of Fig. 7 is the complete list about the embodiment of the invention 1 surface light focal power.The number of degrees of this embodiment 1 and S0.00, Add3.00 are corresponding, in order relatively to put down in writing three kinds of prior aries examples with the number of degrees side by side.Be respectively prior art example A with object side surface be that to increase progressively " the convex surface focal power progressively increasing lens " of face corresponding; The two is that to increase progressively " the two sides focal power progressively increasing lens " of face corresponding for prior art example B and object side surface and eyeball side surface, and the routine C of prior art and eyeball side surface are that to increase progressively " the concave surface focal power progressively increasing lens " of face corresponding.The meaning of the project of using is following among the table 1-1.

DVf1: object side surface is far used the longitudinal direction surface light focal power of number of degrees measuring position F1

DHf1: object side surface is far used the transverse direction surface light focal power of number of degrees measuring position F1

DVn1: object side surface is closely used the longitudinal direction surface light focal power of number of degrees measuring position N1

DHn1: object side surface is closely used the transverse direction surface light focal power of number of degrees measuring position N1

DVf2: the eyeball side surface is far used the longitudinal direction surface light focal power of number of degrees measuring position F2

DHf2: the eyeball side surface is far used the transverse direction surface light focal power of number of degrees measuring position F2

DVn2: the eyeball side surface is closely used the longitudinal direction surface light focal power of number of degrees measuring position N2

DHn2: the eyeball side surface is closely used the transverse direction surface light focal power of number of degrees measuring position N2

Fig. 1 among Figure 10-1 and 1-2 are the figure of surface light power profile of the main line of regard in edge of expression embodiment 1, and X direction is that the lens top is represented on the right side, and lens below, longitudinal axis presentation surface focal power are represented in the left side.At this, Fig. 1-the 1st, the homologue body side surface, Fig. 1-2 is corresponding eyeball side surface.The figure of solid line is the longitudinal direction surface light power profile of expression along main line of regard, and the figure of dotted line is the transverse direction surface light power profile of expression along main line of regard.These are the different basically figure of explanation face structure, remove situation that the aspherisation that the periphery astigmatism uses and the additional astigmatism that the reply astigmatism degree is used become to grade etc. and are omitted.

For relatively, the figure as the surface light power profile of the main line of regard in edge that is illustrated in three kinds of prior aries examples of the same number of degrees of putting down in writing among the 1-1 remembers figure A-1 and 2, figure B-1 and 2, figure C-1 and 2 merging in Figure 14.The meaning of term is following among these figure.

F1: the number of degrees measuring position of using far away of object side surface

F2: the number of degrees measuring position of using far away of eyeball side surface

N1: the nearly number of degrees measuring position of using of object side surface

N2: the nearly number of degrees measuring position of using of eyeball side surface

CV1: the expression object side surface is along the figure (representing with solid line) of the longitudinal direction surface light power profile of main line of regard

CH1: the expression object side surface is along the figure (representing with dot-and-dash line) of the transverse direction surface light power profile of main line of regard

CV2: expression eyeball side surface is along the figure (representing with solid line) of the longitudinal direction surface light power profile of main line of regard

CH2: expression eyeball side surface is along the figure (representing with dot-and-dash line) of the transverse direction surface light power profile of main line of regard

The surface light focal power of F1 among these figure, N1, F2, N2 is corresponding with said table 1-1, and the meaning of terms such as the DVf1～DHn2 also situation with said table 1-1 is identical.Be positioned at the dot-and-dash line of these figure central horizontal directions, the average surface focal power (population mean of the focal power of surface light in length and breadth of F1 and N1) of expression object side surface.The average surface focal power of the object side surface of embodiments of the invention 1 and three kind of prior art example all is unified on 5.50 diopters, the justice that obtains relatively going up with expectation.

The eight kinds of figure that begin with Fig. 1-3-that in Figure 15～Figure 22, represent are that the multiplying power when seeing the lens of the embodiment of the invention 1 along main line of regard distributes; Carry out said tight multiplying power and calculate the figure that the result that tries to achieve representes; The X direction right side is expression lens tops; Expression lens below, left side, the longitudinal axis is represented multiplying power.Heavy solid line is embodiment 1 among the figure, and shallow dot-and-dash line is prior art example A, and heavy dot-and-dash line is prior art example B, and shallow solid line is prior art example C.Following this kind figure is also identical.Fair for hope, transverse axis is when using the eyeball rotation angle to compare each direction of visual lines, and its engineer's scale with each figure longitudinal axis multiplying power conforms to.The meaning of the appended symbol in back of Fig. 1-3-is:

Msv: the form factor of longitudinal direction

Msh: the form factor of transverse direction

Mpv: the focal power factor of longitudinal direction

Mph: the focal power factor of transverse direction

M γ v: the prism factor of longitudinal direction

M γ h: the prism factor of transverse direction

SMv: the multiplying power of longitudinal direction

SMh: the multiplying power of transverse direction

As previously mentioned, the multiplying power SMh of the multiplying power SMv of longitudinal direction and transverse direction has

SMv＝Msv×Mpv×Mγv

The relation of SMh=Msh * Mph * M γ h.

Embodiment 1 is refractive index n=1.699 with said three kinds of prior art examples, center thickness t=3.0mm, and GC does not have the specification of prism at the geometry center.Object lens focal power (inverse of object lens distance) is the object lens focal power Px=0.00 diopter (a unlimited distant place) of F1, F2; The object lens focal power Px=2.50 diopter (40cm) of N1, N2, the object lens focal power of other positions is provided by superior 2.50 diopters of ratio of the additional optical focal power of main line of regard on the edge.And the distance L=15.00mm from summit behind the lens to corneal vertex, the distance C R=13.0mm from corneal vertex to the eyeball rotation center.Eyeball rotation angle θ is placed on eyeball rotary middle point C on the normal of the geometry center GC through the object side lens surface, and the rotation angle this normal when consistent with sight line is set at 0 degree, and with (+) expression, the below is with (-) expression the top.Consider with following mode then: through being unified into eyeball rotation angle θ=+ 30.0 F1, F2; To eyeball rotation angle θ=-15.0 of N1, N2, the distribution that increases progressively effect and surface light focal power can all be compared at positive, the inside either side under identical conditions.

The table 1-2 of Fig. 7 is the complete list to the tight multiplying power result of calculation of specific line of sight direction of the embodiment of the invention 1 and three kinds of prior aries example of preparing in order to compare, and is corresponding with Fig. 1-3-SMh (the comprehensive multiplying power of transverse direction) of Fig. 1-3-SMv (the comprehensive multiplying power of longitudinal direction) of said Figure 21 and Figure 22.Bright accordingly, the value of multiplying power is different on longitudinal direction and transverse direction, so calculated both multiplying powers.At this, the meaning of table 1-2 symbolic representation is following.

SMvf: through far away with the longitudinal direction multiplying power on the sight line of measurement point

SMvn: through near with the longitudinal direction multiplying power on the sight line of measurement point

SMvfn: longitudinal direction difference of magnification (SMvn-SMvf)

SMhf: through far away with the transverse direction multiplying power on the sight line of measurement point

SMhn: through near with the transverse direction multiplying power on the sight line of measurement point

SMhfn: transverse direction difference of magnification (SMhn-SMhf)

Have a look SMvfn and the SMhfn of table 1-2; Be longitudinal direction difference of magnification (SMvn-SMvf) and transverse direction difference of magnification (SMhn-SMhf); Then recognize with prior art A 0.1380 and 0.1015, prior art B 0.1360 and 0.0988, prior art C 0.1342 and 0.0961 relative, the value of the embodiment of the invention 1 is suppressed to 0.1342 and 0.0954 low like this difference of magnification.Promptly recognize the embodiment of the invention 1 far away with portion with closely than prior art 1 still less with the difference of magnification of portion, so to the distortion of picture with rock than prior art 1 and more be added with improvement.And in the calculating of carrying out multiplying power, do not consider the different of longitudinal direction and transverse direction fully with said prior art 1 corresponding patent specification.But Fig. 1-3-SMv (the comprehensive multiplying power of longitudinal direction) of the Figure 21 that calculates the tight multiplying power corresponding with the embodiment of the invention 1 and Fig. 1-3-SMh (the comprehensive multiplying power of transverse direction) of Figure 22 compare, and will understand at once that longitudinal direction is obviously different with the multiplying power distribution of the picture of transverse direction.And find out easily this difference mainly near with portion and below (is-20 ° below the near side (ns) in the eyeball rotation angle) remarkable.

Calculating formula like said multiplying power:

The multiplying power SMv=Msv of longitudinal direction * Mpv * M γ v

The multiplying power SMh=Msh of transverse direction * Mph * M γ h

Fig. 1-3-SMv multiplies each other its three key element Fig. 1-3-Msv and Fig. 1-3-Mpv and Fig. 1-value of 3-M γ v just can obtain, and likewise, Fig. 1-3-SMh multiplies each other its three key element Fig. 1-3-Msh and Fig. 1-3-Mph and Fig. 1-value of 3-M γ h just can obtain.Longitudinal direction and transverse direction in this each key element compare, and it is significantly poor on form factor Msv and Msv, to can't see, but Mpv and Mph near with portion below (is-25 ° below the near side (ns) in the eyeball rotation angle) just see different.And M γ v and M γ h near with portion and below (is-15 ° below the near side (ns) in the eyeball rotation angle) just remarkable different.Recognize that promptly Fig. 1-3-SMv main cause different with Fig. 1-3-SMh is the different of M γ v and M γ h, what secondary cause was Mpv with Mph is different, and on Msv and Msv, can't see significantly poorly, and almost it doesn't matter.Promptly with the corresponding claims of prior art 1 in why do not see the different of longitudinal direction and transverse direction multiplying power; Be because it not to consider to become prism factor M γ v and the M γ h of the different main causes of multiplying power fully, to the focal power factor Mpv of the secondary cause poor cause of also not coming out with Mph because of the angle of having ignored object lens distance and sight line and lens.And, prior art 1 as the form factor Msv and the Msv that improve basis, as long as seeing, the engineer's scale that uses with the embodiment of the invention 1 is also failed to find each routine mutual difference on the difference of magnification of distance.

Prior art 1 be through " reduce far away with portion with closely with the difference of magnification of portion " realize " can reduce the distortion of picture and rock ", and the present invention considers that especially " difference of magnification of minimizing longitudinal direction and transverse direction " also has the effect of " can reduce the distortion of picture and rock ".Promptly avoid regarding cubic object as flat, regard the object of circle as ellipticity.The essence that improves this visual sense feeling is, be that " it is poor to reduce " does not capture " making ratio approach 1 " in this way.At this importantly, regard cubic object flat as, regard the object of circle as elliptoid sensation, it is not " far and near than " but " aspect ratio ".Be that the present invention not only " reduces far away from portion and nearly difference of magnification with portion ", and be through " difference of magnification of minimizing longitudinal direction and transverse direction makes the multiplying power ratio near 1 ", obtain the effect of improving of " can reduce the distortion of picture and rock " as prior improvement.These tendencies, mainly near with portion below (is-25 ° below the near side (ns) in the eyeball rotation angle) remarkable.

Embodiment 2

The table 2-1 of Fig. 8 is the complete list about the embodiment of the invention 2 surface light focal powers.The number of degrees of this embodiment 2 and S+6.00, Add3.00 are corresponding, in order relatively to put down in writing three kinds of prior aries examples with the number of degrees side by side.Be respectively prior art example A with object side surface be that to increase progressively " the convex surface focal power progressively increasing lens " of face corresponding; The two is that to increase progressively " the two sides focal power progressively increasing lens " of face corresponding for prior art example B and object side surface and eyeball side surface, and the routine C of prior art and eyeball side surface are that to increase progressively " the concave surface focal power progressively increasing lens " of face corresponding.The meaning of term such as employed DVf1～DHn2 is identical with said table 1-1 among the table 2-1.Fig. 2-1 and 2 is figure of surface light power profile of the main line of regard in edge of the expression embodiment of the invention 2, and the X direction right side is expression lens tops, and lens below, longitudinal axis presentation surface focal power are represented in the left side.At this, Fig. 2-the 1st, homologue body side surface, Fig. 2-the 2nd, corresponding eyeball side surface.The figure of solid line is the longitudinal direction surface light power profile of expression along main line of regard, and the figure of dotted line is the transverse direction surface light power profile of expression along main line of regard.These are the different basically figure of explanation face structure, remove situation that the aspherisation that the periphery astigmatism uses and the additional astigmatism that the reply astigmatism degree is used become to grade etc. and are omitted.

For relatively, as the figure of the surface light power profile of the main line of regard in edge that is illustrated in three kinds of prior aries examples of the same number of degrees of putting down in writing among the 2-1, the figure A-1 and 2 that uses among the said embodiment 1, scheme B-1 and 2, scheme C-1 and 2 and reuse.Therefore the meaning of term is identical with said embodiment 1 among these figure; But the surface light focal power of F1, N1, F2, N2 is also corresponding with table 2-1; The average surface focal power that is positioned at the represented object side surface of the dot-and-dash line of horizontal direction of central authorities is also corresponding with table 2-1, and then becoming according to this situation all is the dark curves of 10.50 diopters.

The eight kinds of figure that begin with Fig. 2-3-that in Figure 23～Figure 30, represent are that the multiplying power when seeing the lens of the embodiment of the invention 2 along main line of regard distributes, and carry out said tight multiplying power and calculate the figure that the result that tries to achieve representes.Term and the meaning that is attached to the symbol behind Fig. 2-3-etc., heavy solid line is the embodiment 2 in figure, all the situation with said embodiment 1 is identical.All the situation with said embodiment 1 is identical with object lens focal power, eyeball rotation angle etc. for the refractive index of embodiment 2 and the use of said three kinds of prior aries example; But embodiment 2 is S+6.00, Add3.00 with the number of degrees of said three kinds of prior aries example, so only center thickness t approaches actual goods as 6.0mm.

The table 2-2 of Fig. 8 is the complete list to the tight multiplying power result of calculation of specific line of sight direction of the embodiment of the invention 2 and three kinds of prior aries example of preparing in order to compare, and is corresponding with said Fig. 2-3-SMv (the comprehensive multiplying power of longitudinal direction) and Fig. 2-3-SMh (the comprehensive multiplying power of transverse direction).At this, the meaning of table 2-2 symbolic representation and said table 1-2's is equivalent in meaning.

Have a look SMvfn and the SMhfn of table 2-2; Be longitudinal direction difference of magnification (SMvn-SMvf) and transverse direction difference of magnification (SMhn-SMhf); Then recognize with prior art A 0.2275 and 0.1325, prior art B 0.2277 and 0.1268, prior art C 0.2280 and 0.1210 relative, the value of the embodiment of the invention 2 is suppressed to 0.2151 and 0.1199 low like this difference of magnification.Promptly recognize the embodiment of the invention 2 far away with portion with closely than prior art 1 still less with the difference of magnification of portion, so to the distortion of picture with rock than prior art 1 and more be added with improvement.And with said embodiment 1 likewise; Fig. 2-the 3-SMv (the comprehensive multiplying power of longitudinal direction) that calculates the tight multiplying powers corresponding with the embodiment of the invention 2 compares with Fig. 2-3-SMh (the comprehensive multiplying power of transverse direction), will understand at once that longitudinal direction is obviously different with the multiplying power distribution of the picture of transverse direction.

And find out that easily this difference mainly (is-10 ° below the near side (ns) in the eyeball rotation angle) below the pars intermedia significantly.With said embodiment 1 likewise; Embodiment 2 also is; Fig. 2-3-SMv multiplies each other its three key element Fig. 2-3-Msv and Fig. 2-3-Mpv and Fig. 2-value of 3-M γ v just can obtain, likewise; Fig. 2-3-SMh multiplies each other its three key element Fig. 2-3-Msh and Fig. 2-3-Mph and Fig. 2-value of 3-M γ h just can obtain.Longitudinal direction and transverse direction in this each key element compare, and it is significantly poor on form factor Msv and Msv, to can't see, but Mpv and Mph near with portion below (is-20 ° below the near side (ns) in the eyeball rotation angle) just see different.And M γ v and M γ h are just significantly different (is-10 ° below the near side (ns) in the eyeball rotation angle) below the pars intermedia.At this, far away with portion above (be+20 ° more than the near side (ns)) in the eyeball rotation angle also found difference, but appearance of each example difference be far away with (be+30 ° more than the near side (ns)) above portion quite far away in the eyeball rotation angle, usage frequency is few, so can ignore.

Promptly recognize with said embodiment 1 likewise; Embodiment 2 also is that Fig. 2-3-SMv of Figure 29 main cause different with Fig. 2-3-SMh of Figure 30 is the different of M γ v and M γ h; What secondary cause was Mpv with Mph is different, and on Msv and Msv, can't see significantly poorly, and almost it doesn't matter.And, prior art 1 as the form factor Msv and the Msv that improve basis, as long as seeing, the engineer's scale that uses with the embodiment of the invention 2 is also failed to find each routine mutual difference on the difference of magnification of distance.Embodiment 2 also with said embodiment 1 likewise; Not only " reduce " far with portion and nearly difference of magnification with portion; And be through " reduce the difference of magnification of longitudinal direction and transverse direction, multiplying power is compared near 1 " as prior improvement, obtain the effect of improving of " can reduce the distortion of picture and rock ".These tendencies, mainly near with portion below (is-25 ° below the near side (ns) in the eyeball rotation angle) remarkable.

Embodiment 3

The table 3-1 of Fig. 9 is the complete list about the embodiment of the invention 3 surface light focal powers.The number of degrees of this embodiment 3 and S-6.00, Add3.00 are corresponding, in order relatively to put down in writing three kinds of prior aries examples with the number of degrees side by side.Be respectively prior art example A with object side surface be that to increase progressively " the convex surface focal power progressively increasing lens " of face corresponding; The two is that to increase progressively " the two sides focal power progressively increasing lens " of face corresponding for prior art example B and object side surface and eyeball side surface, and the routine C of prior art and eyeball side surface are that to increase progressively " the concave surface focal power progressively increasing lens " of face corresponding.The meaning of term such as employed DVf1～DHn2 and said table 1-1 and to show 2-1 identical among the table 3-1.

Fig. 3 of Figure 11-1 and 3-2 are the figure of surface light power profile of the main line of regard in edge of the expression embodiment of the invention 3, and the X direction right side is expression lens tops, and lens below, longitudinal axis presentation surface focal power are represented in the left side.At this, Fig. 3-the 1st, homologue body side surface, Fig. 3-the 2nd, corresponding eyeball side surface.The figure of solid line is the longitudinal direction surface light power profile of expression along main line of regard, and the figure of dotted line is the transverse direction surface light power profile of expression along main line of regard.These are the different basically figure of explanation face structure, remove situation that the aspherisation that the periphery astigmatism uses and the additional astigmatism that the reply astigmatism degree is used become to grade etc. and are omitted.

For relatively, as the figure of the surface light power profile of the main line of regard in edge of three kinds of prior aries examples of the same number of degrees of putting down in writing among the table 3-1 that is illustrated in Fig. 9, the figure A-1 and 2 that uses in said

embodiment

1 and 2, scheme B-1 and 2, scheme C-1 and 2 and reuse.Therefore the meaning of term is identical with said

embodiment

1 and 2 among these figure; But the surface light focal power of F1, N1, F2, N2 is also corresponding with table 3-1; The average surface focal power that is positioned at the represented object side surface of the dot-and-dash line of horizontal direction of central authorities is also corresponding with table 3-1, and then becoming according to this situation all is the shallow curves of 2.50 diopters.

The eight kinds of figure that begin with Fig. 3-3-that in Figure 31～Figure 38, represent are that the multiplying power when seeing the lens of the embodiment of the invention 3 along main line of regard distributes, and carry out said tight multiplying power and calculate the figure that the result that tries to achieve representes.Term and the meaning that is attached to the symbol behind Fig. 3-3-etc., heavy solid line is the embodiment 3 in figure, all the situation with said

embodiment

1 and 2 is identical.All the situation with said

embodiment

1 and 2 is identical with object lens focal power, eyeball rotation angle etc. for the refractive index of embodiment 3 and the use of said three kinds of prior aries example; But embodiment 3 is S-6.00, Add3.00 with the number of degrees of said three kinds of prior aries example, so only center thickness t approaches actual goods as 1.0mm.

The table 3-2 of Fig. 9 is the complete list to the tight multiplying power result of calculation of specific line of sight direction of the embodiment of the invention 3 and three kinds of prior aries example of preparing in order to compare, and is corresponding with said Fig. 3-3-SMv (the comprehensive multiplying power of longitudinal direction) and Fig. 3-3-SMh (the comprehensive multiplying power of transverse direction).At this, the meaning of table 3-2 symbolic representation and said table 1-2 and table 2-2's is equivalent in meaning.

Have a look SMvfn and the SMhfn of table 3-2; Be longitudinal direction difference of magnification (SMvn-SMvf) and transverse direction difference of magnification (SMhn-SMhf); Then recognize with prior art A 0.0475 and 0.0774, prior art B 0.0418 and 0.0750, prior art C 0.0363 and 0.0727 relative; The value of the embodiment of the invention 2 is 0.0512 and 0.0726 such values, and the longitudinal direction difference of magnification has increased and the transverse direction difference of magnification has reduced.But it all is its low value of 1/3 to 1/5 that the longitudinal direction difference of magnification is compared with embodiment 2 with said embodiment 1; Is the transverse direction difference of magnification to reduce the consideration that combines a little, then the embodiment of the invention 3 far away with portion with closely relatively we can say there is not big difference with the difference of magnification and the prior art 1 of portion.Observe Fig. 3-3-SMv (the comprehensive multiplying power of longitudinal direction) and Fig. 3-3-SMh (the comprehensive multiplying power of transverse direction) that calculate with the embodiment of the invention 3 corresponding tight multiplying powers; The embodiment of the invention 3 is compared with the prior art example; Particularly minimum with subordinate side (is-20 ° below the near side (ns) in the eyeball rotation angle) " multiplying power of longitudinal direction is than 1 little tendency " closely; The result is that " difference of magnification in length and breadth " becomes minimum, as distortion and rocking than prior art example improve.

Longitudinal direction and the multiplying power of transverse direction picture distribute among Fig. 3-3-SMv of Figure 37 (the comprehensive multiplying power of longitudinal direction), and to occur significantly different be below (is-10 ° below the near side (ns) in the eyeball rotation angle) and the top with portion far away (be+10 ° more than the near side (ns)) of pars intermedia in the eyeball rotation angle, appearance of each example difference below closely with portion (is-20 ° below the near side (ns) in the eyeball rotation angle) and far away with portion a little above (be+25 ° more than the near side (ns)) in the eyeball rotation angle.Wherein, far use the usage frequency of top a little of portion few, thus can ignore, but closely use the below usage frequency of portion many, can not ignore.Consequently the embodiment of the invention 3 is compared with the prior art example; Particularly closely approaching most 1 with the multiplying power of its longitudinal direction of subordinate side's (is-20 ° below the near side (ns) in the eyeball rotation angle); Consequently " difference of magnification in length and breadth " becomes minimum, as distortion and rocking than prior art example improve.These tendencies, mainly near with portion below (is-25 ° below the near side (ns) in the eyeball rotation angle) remarkable.And, to prior art 1 as the form factor Msv and the Msh that improve basis, with the embodiment of the invention 1 and embodiment 2 likewise, the engineer's scale that promptly uses embodiment 3 to use is seen and is also failed to find mutual difference of each example on the difference of magnification of distance.

Embodiment 4～7

As embodiments of the invention, except said embodiment 1～3, the combination of various surface light power profile can be arranged in the scope of the present invention's record.At this, as with embodiment 1 with the application examples of the number of degrees embodiment 4～6 with as representing embodiment 7 with the application examples of the number of degrees with embodiment 2.The surface light focal power of these embodiment with to the complete list and the figure of the tight multiplying power result of calculation of specific line of sight direction, Fig. 4-1, Fig. 4-2 of being illustrated in table 1-1, table 1-2 and Figure 12～Figure 14 of Fig. 7 are to Fig. 7-1, Fig. 7-2.

Variation

The present invention is not only common prescription values; And a small amount of glasses user's who grasps as lens meter before this individual factor, for example distance from corneal vertex to summit, lens rear, the distance from the eyeball rotation center to summit, lens rear; The degree that the right and left eyes video picture does not wait; Right and left eyes height poor, the object lens distance of frequent myopia, top rake of picture frame (above-below direction) and angle of oscillation (left and right directions); The V-arrangement restitope of rims of the lens thickness direction put etc. be combined in the lens design, so just can adapt to the requirement of article made to order (individual design) as input information.And the present invention is the face structure of both-sided aspherical, but obtains not necessarily need after accepting and order for goods, beginning to carry out two sides processing again in the effect of the present invention.For example prepare " semi-manufacture " of the object side surface that is fit to the object of the invention in advance; " semi-manufacture " of the object side surface that the number of degrees and the said article made to order purposes such as (individual design) from them, selected and write out a prescription in the back of accepting and order for goods is fit to; After accepting and order for goods, only machine the eyeball side surface, this is useful on the point of cost and process velocity.

As the concrete example of this method, for example consider to prepare in advance " semi-manufacture " of symmetrical object side surface.Then corresponding with the esotropia effect of the eye of myopia near with portion to bias internal, corresponding with interocular distance and near-sighted personal information such as object lens distance, can the eyeball side surface organize as the asymmetric curved surface in the left and right sides of achieving the goal into.Certainly these personal information are not only actual measurement, infer and be set at average value etc., information obtain and definite method can take one thing with another, how the present invention does not limit to these methods.Carrying out not only common prescription values; And when joining the optical computing of using in the lens design to described individual factor; The two curved surface of object lens body side surface or eyeball side surface or object side surface and eyeball side surface is mainly eliminated the variation of the generation of the astigmatism of can not quadrature by sight line and lens face and causing and the number of degrees or " corrective action " that reduce usefulness can be added.

And the stereo rotating motion that generally knows that eyeball when we look around on every side is to follow the rule that is called " listing's law "; But when in the prescription number of degrees astigmatism degree being arranged; Even then aim at the astigmatism axle of eyeglass lens with " the astigmatism axle of eyes front eyeball "; But in that also both astigmatism axles are inconsistent sometimes when periphery is seen; By this when periphery is seen lens and the variation of generation and the number of degrees of the inconsistent caused astigmatism of astigmatic direction of principal axis of eye eliminate or reduce " corrective action " of usefulness, also can be added on the curved surface on surface of lens of the present invention with astigmatism correction active side.

Definition as " the adding number of degrees of regulation " of the present invention; Like Fig. 6; Except touching the peristome of lens meter the far away of object side surface with number of degrees measuring position F1 and near with number of degrees measuring position N1; Outside the situation as the difference in power of measuring; Various situation below also having: touch the far away from number of degrees measuring position F2 and near with number of degrees measuring position N2 of eyeball side surface to the peristome of lens meter, as the situation of the difference in power of measuring, the peristome of going back the handlebar lens meter touches the far away from the measured focal power of number of degrees measuring position F2 of eyeball side surface; With make its rotation to eyeball rotation center position as the center; Poor towards the nearly focal power of measuring with number of degrees measuring position N2 and with N3 also has as the special only situation of usage level direction focal power composition of each focal power, also can adopt arbitrary definition in the middle of these.

Like above detailed description; According to the present invention; Consider the influence of " angle of sight line and lens face " and " object lens distance ",, reduce far difference of magnification with portion and nearly picture with portion through correctly calculating the multiplying power of picture; The little effective field of view that broad range is arranged of distortion in the time of giving prescription values had good correcting vision and use; And, can after accepting and order for goods, only carry out the asymmetrical Machining of Curved Surface in the left and right sides as the esotropia effect of the near-sighted eye of correspondence to the eyeball side surface as object side surface use " symmetrical semi-manufacture ", can obtain reducing the double-sided aspheric focal power progressively increasing lens of process time and cost.

Claims

1. the manufacturing approach of a double-sided aspheric focal power progressively increasing lens; This double-sided aspheric focal power progressively increasing lens possesses to separately distributing the effect that increases progressively focal power as first refractive surface of object side surface with as second refractive surface of eyeball side surface; It is characterized in that

Prepare processed semi-manufacture, demarcate and left-right symmetric so that said first refractive surface becomes by the meridian with number of degrees measuring position F1 far away through said first refractive surface,

After accepting order; Said second refractive surface is processed; The left and right sides is asymmetric so that said half-finished said second refractive surface becomes by demarcating through the meridian with number of degrees measuring position F2 far away of said second refractive surface; And the nearly configuration with number of degrees measuring position N2 of said second refractive surface only inwardly relies on nasal side by predetermined distance.